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Double-ion intercalated molybdenum oxide nanosheet, heterojunction and preparation method thereof

A technology of molybdenum oxide and nanosheets, which is applied in the field of optoelectronic materials, can solve the problems of relying on charge transfer and limiting applications, and achieve the effects of improving photoelectric performance, improving conductivity, and reducing band gap

Active Publication Date: 2019-06-25
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional intercalation is basically an electrochemical reaction, which relies on the charge transfer between the intercalation agent and the material, thus limiting the intercalation to a single ion species
Two-dimensional layered molybdenum oxide has attracted extensive attention because of its high carrier mobility, but its wide bandgap (>3eV) characteristics also greatly limit its application.

Method used

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  • Double-ion intercalated molybdenum oxide nanosheet, heterojunction and preparation method thereof
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  • Double-ion intercalated molybdenum oxide nanosheet, heterojunction and preparation method thereof

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Experimental program
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Embodiment 1

[0026] Sn / Co Co-doped Double Ion Intercalation Molybdenum Oxide Nanosheets and Preparation of Heterojunction

[0027] Preparation of double-ion intercalated molybdenum oxide nanosheets:

[0028] (1) Preparation of MoO 3 Nanosheets

[0029] Prepare a 2×2cm silicon oxide sheet and a 1×1cm molybdenum oxide sheet, raise the temperature of the muffle furnace to 540-600°C and stabilize it for a period of time, preferably at 580°C, and keep it in the atmosphere for 5-20min. Place it on a silicon oxide wafer substrate, and then put it into a muffle furnace to keep the temperature constant for 5-20 minutes, preferably 5 minutes. The muffle furnace is in an atmospheric environment, and then take it out and cool it to room temperature. In other embodiments, silicon wafers or mica wafers may also be used instead of silicon dioxide wafers.

[0030] (2) Preparation of a precursor solution comprising a stannous salt

[0031] Weak acid and stannous salt with a molar ratio of 1:10 are diss...

Embodiment 2

[0039] Sn / Cu co-doped double ion intercalation molybdenum oxide nanosheets and their heterojunction preparation

[0040] Steps (1)-(3) are the same as in Example 1;

[0041] (4) Preparation of copper sulfate solution: take 0.01g of copper sulfate powder and add 60ml of deionized water, ultrasonically oscillate for 10min and dilute to obtain 10 -4 mol / L cobalt sulfate solution. Take 0.01g of zinc powder and sprinkle it on the sample obtained in step (3), to ensure that an appropriate amount of Zn particles and Sn 4+ Fully contact the ion-intercalated molybdenum oxide nanosheet samples, drop 1 to 2 drops of cobalt sulfate solution, react for 20 minutes, blot the residual solution on the substrate surface and add absolute ethanol to clean the substrate surface.

[0042] Step (5) is with embodiment 1;

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Abstract

The invention relates to a double-ion intercalated molybdenum oxide nanosheet, a heterojunction and a preparation method thereof. The method includes the steps of: heating a substrate with growing molybdenum oxide nanosheet in a precursor solution containing a stannous salt to obtain a Sn<4+> ion intercalated molybdenum oxide nanosheet; placing zinc microparticles on the surface of the nanosheet,adding a metal salt solution dropwise for reaction to obtain a Sn<4+> and metal cation intercalated molybdenum oxide nanosheet; and placing a molybdenum on a high temperature resistant substrate surface, maintaining the state for 5-20min in a 540-600DEG C atmospheric environment, and then performing cooling to room temperature so as to obtain the substrate with growing molybdenum oxide nanosheet.The method provided by the invention realizes intercalation of Sn<4+> ion and a second metal ion to the interlayer of MoO3, reduces the band gap, improves the conductivity of molybdenum oxide, widensthe absorption band range, at the same time realizes the construction of heterojunction in single material, and improves the photoelectric performance.

Description

technical field [0001] The invention relates to the field of optoelectronic materials, in particular to a double-ion intercalation molybdenum oxide nanosheet, a heterojunction and a preparation method thereof. Background technique [0002] Using guest intercalation agents to insert foreign ions in situ into the van der Waals gap of two-dimensional layered materials through disproportionation redox reaction, hydrazine reduction or carbonyl decomposition, etc., can not only realize the regulation of the intrinsic physical properties of the material, including loading The improvement of carrier concentration, the optimization of photoelectric characteristics, etc., and it is expected to be extended to photodetection, energy storage and other applications. However, traditional intercalation is basically an electrochemical reaction, which relies on the charge transfer between the intercalant and the material, thus limiting the intercalant to a single ion species. Two-dimensional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/02B82Y40/00H01L31/032H01L31/112
Inventor 谢伟广赖浩杰何锐辉陈科球罗佳玉刘彭义
Owner JINAN UNIVERSITY